Furnace-mouth lining for boilers



Nov. 17, 1925- W. H. LAWRENCE FURNACE MOUTH LINING F 'OR BOILERS Filed April 10. 19 23 INVENTOR.

ATTORNEY.

of the lining; I

Patented Nov. 17, 1925.

UNITED STATES PATENT OFFICE.

WILLIAM H. LAWRENCE, 0F WESTFIELD, MASSACHUSETTS, ASSIGNOR, BY MESNE AS- I SIGNMENTS, OF ONE-HALF 'lO ETHEL L. LAW- HENCE, OF WESTFIELD, MASSACHU- SETTS.

FURNACE-MOUTH LINING- FOR BOILERS.

' Application filed April 10, 1923.. Serial No. 631,052.

To all whom it may concern. I

Be it known that p I, XVILLIAM H. LAWRENCE, a citizen of the United States 01 America, and a resident of Vestfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Furnace-Mouth Lining for Boilers, of which the following is a specification, I

My invention relates to in'iprovements in devices or apparatus designed to beplaced in the mouths of boiler furnaces for. the purpose of protecting the walls of such mouths, raising the temperature of the feed water, and promoting the circulation of the same, and consists essentially ofbaseso't peculiar ZOIlStl'llCtiOl'l, which are connected by the neo- -es sai'y piping and headers, and provided with the fittings needed for clean-out purposes, all as hereinafter set forth.

the object of my invention is to provide a boiler-furnacemouth lining that is simple in construction, and readily adaptable and applicable to furnaces of various sizes and shapes, and one which effectually reduces the temperature at the furnace mouth, raises the temperture and increases or promotes the circulation of the feed water, and has cleanout facilities of such a nature that the life or durability and efiiciency 01 said lining is 0r nia'y be greatly prolonged.

is a prime necessity, in a furnace-mouth lining for boilers, that the same include sufhciently effective means for collecting-and disposing of the sediment, which invariably accumulates to a greater or less extent in the lining, and the present lining is designed and constructed more especially with this end in view. I

The above and other objects and advantages, which latter will appear in the course of the following description, are due in'great measure to the new and improvedconstruction of the bases of the lining.

I attain the objectsand secure the advantages of my trated in the accompanying drawing's, in which-- 7 V Figure 1 is a top 'planof-a furnace-mouth lining for boilers which embodies a practical form of my invention; Fig. 2, a frontelevation of said lining;

t; a enlarge 15 ve tical.

invention by the means illus- Fig. an end'el'evation.

an melme part 10 at cal section through one of the lining bases,

on lines 55, in Fig. 4, and Fig. 6, an"

isometric view. of said base, the upper portion of the same being broken off.

Similar reference characters designate similar parts throughout the several views. The furnace-mouth lining, illustrated in. the general views of the drawings, comprises a pair of hollow bases 1, each 01 which is provided with clean-out members presently to-bedescribed, three (more or less) vertical pipes 2 rising from each of said bases, a manifold or header 3 mounted on each set of said pipes, .and three (more or less) horizontal pipes 6 connectingrsaid headers. The bases 1 are alike'except they are made in rights and lefts in the present example. The pipes 2, headers 3, example are old and well known. Each base 1 is provided inthe'outer side with an inlet 7 and each header 3 is provided in the top with an outlet 8. In practice, one of the inlets 7 and one of the outlets 8 are plugged, and the feed water enters the other inlet 7 and, after circulating through the bases 1, pipes 2, headers 3, and pipes 6, passes away through the other outlet 8. To be more explicit: If the water be received in the are hand base 1, the inlet 7 in the right-hand base 1 is plugged, and the outlet '8 in thele'fthand header 3 is also plugged, the water finally escapingthrough the outlet8 in the right-hand header 3 or, if the water be re-' ceived in the right-hand base, the inlet in the left-hand base and the outlet in. the right-hand header 3 are plugged;

' The inlets 7 and outlets 8 in the bases 1 and headers 3, respectively, are tapped open ings, and there-are tapped openings in said bases and headers to receive the ends of the pipes 2 and 6. One of the inlets 7 is locatedrin the outer side ofeach base 1 a shortdistance below the horizontal plane of the bottom edge of the middle pipe 2 which rises from said base. c

"Each base 1 isgenerally rectangular in shape, but is undercut at the front-end to form an. overhanging part, as at 9, and has the rear end, which and pipes 6 in the present lOO inclined part extends downwardly and forwardly from the bottom of the vertical portion of the back wall to the rear edge of the supporting bottom or lowermost portion of said base. The inner side of the base 1 is continued downwardly and forwardly to provide a leg or support 11, the front edge of which is flush with the face ofthe-overhanging portion (9) and the under edge of which is flush with the under surface: of the supporting bottom of said base. The leg 11 assists in supporting and adds to the stability of the base. A vertical wall 12 extends between the front edge of the supporting bottom and the rear or inner edge of the bottom of the overhanging part 9 of the base, and there is a tapped opening 13 in the center of said wall. Extending rearwardly from the junction of the wall 12 with the bottom of the overhanging part 9 and on approximately the same level-with said bottom is an extension or horizontal partition 1%. The partition 14 forms with. the wall 12 and the supporting bottom of the base a pocket 15. against the inclined portion 10' of the rear wall of the case, and between the inner or rear edge of the partition 14 and the vertical portion of said rear wall.

IillSlllUCll as the back of the lining is next to the lire, the circulation in the bases 1. is from front to rear, the" water passing down through the foremost pipes 2 and to some extent through the middle pipes 3 into said bases, and up out of said bases into the rearmost pipes 2, and the construction of the bases is such as to promote or assist in promoting circulation in this manner, and to prevent the water thus circulating from coming into contact with the foreign matter or sediment in the pockets 15. The water in its downward course enters the bases 1 above the bottoms of the overhanging parts 9 and above the partitions 14, and is on its way upwardly by the time the rear edges of said partitions are reached. Art the same time the foreign matter is swept or carried rearw'ardly' over the back edge of the partitions 141-, drops down behind said partitions onto the inclined portions 10 of the rear Walls, and slides forward thereon into the pockets 15. In other words, the sediment from the water is either deposited behind the partitime 14, or, if deposited above said partitions and the; floors of the overhanging parts 9', the same is washed off over the rear edge of said partitions and precipitated into the pockets. Clearly, therefore, it is seen that the foreign matter or sediment eventually is deposited in the pockets. Scales from the boiler are carried into the bases 15,, and Inns from the water becomes" deposited on the" sides thereof and especially on t'l res'id' and low down on such sides. Kitis q-aite necessarythatthese scales The pocket 15' opens behind and this deposit be removed in order to maintain the efliciency of the lining. lVith the pockets 15 located or situated as they are, the scales and deposits can be removed in order to maintain the efficiency of the lining. Vith the pockets 15 located or situated as they are, the scales and deposits can be removed to advantage respectively by flushing or blowing out and scraping, as set forth below.

Projecting forward from the front wall 12 beneath the overhang 9 of each pocket 15, an opening at the inner or rear end into said pocket, is a pipe 16-see Fig. 4. At the front end of the pipe 16 is a T 17 positioned so that it can have a screw plug 18 in the outer end and a short pipe 19 descending from the bottom thereof. A. valve 20 is connected with the pipe 19, and a short pipe 21 descends from said valve. A horizontal pipe 22 is connected by an elbow 23 with the lower end of the pipe 21', said pipe 22 extending rearwardly to open usually into the ash-pit of the boiler or furnace.

Periodically or Whenever it is deemed: necessary, the valve 20 is opened, while the con tents of the associates base 1 is under pressure, and such contents is blown out through the pipes 16 and 19, said valve, and the pipes 21 and. 22, carrying with it whatever loose scales, dirt, and other sediment there may be in the-pocket 15 in said base. When. the blowing-out operation is completed the valve 20 is again closed.

From time to time, as may be required, the plug 18 is removed from its T 17, a suitable instrument passed through such T and. the pipe .16 behind into the pocket which. opens into said pipe, and with such instru ment the deposit is removed from the sides of said pocket, and more especially from the back side where such deposit is more liable to collect. After the sides of the pocket have been scraped and the instrumentremoved, the plug 18 is screwed into place again, and the valve 20 is opened to blow out the base and remove from the pocket the matter which has just been forcibly detached, With any other sediment that may be therein.

In order to obtain the best results, in a; furnace-mouth lining, it is necessary that the sediment pockets be situated; in the back parts of the bases, with the; blow-out open ings not too far from the back ends of such pockets, because, otherwise, the foreign mat ten in part would fail to find its way into the pockets, and the operation of cleaning out the pocketswould not be. sulii ient thorough and complete, as will readily QB understeod. Nevertheless, the position of the Wall 12 in each. case; may be varied that isto say, such wall may be located in front of. enbelii nd the position which it occupies the drawings, and the horizontal, panti tion 14, which is in line with the bottom of the overhang 9, may be longer or shorter.

During the blowing-out operation the water is directed by the partition let towards the rear wall of the base, and caused to be forcibly projected against the same, owing to the presence of said partition, with the result that said wall is or may be kept clean, which is a factor very essential to the life of the lining. The rear wall, being next to the fire, becomes extremely hot, and, unless kept free from scale and sediment, soon cracks and becomes useless.

I do not intend or desire to be restricted to the construction of the furnace-mouth lining above the bases 1, and may use some well-known superstructure which is different from that herein shown and described.

I am aware that furnace-mouth linings "for boilers have been constructed with various types of bases having therein sediment pockets of different kinds, and do not, therefore, seek to claim such elements broadly.

lVhat I do claim as my invention, and desire to secure by Letters Patent, is-

In a furnace-mouth lining for boilers, a hollow base having a flat unbroken support ing bottom, openings in the top, and an overhanging front part, the lower portion of the rearwall extending straight downwardly and then forwardly to meet the back edge of said supporting bottom, and said base also having a wall between the front edge of said bottom and the bottom of said overhanging part, in which last-named wall is a blow-off opening, said bottom of said overhanging part being extended rearwardly to assist in forming a sediment pocket below, with an entrance between said rear wall and the rear edge of such extension, the top and bottom of said sediment pocket being parallel, also the sides of said pocket, and the front of the pocket being vertical and the back inclined upwardly and rearwardly.

WILLIAM H. LAWRENCE. 

